Power tranformer

Key Attributes.

Specifications

• • 3 phase, 50 Hz in voltages of 11kV, 22kV, 33kV, 66 kV & 110 kV
  • Off-circuit tap changer to provide ± 5 %, ± 7.5% & +5% to -10% taps in steps of 2.5%
  • On load tap changer to provide +5% to -15% taps in steps of 1.25% as standard range & also custom built for any other ranges. OLTC will be internally/externally mounted as per the requirement
  • Class A, uniform/non-uniform insulated
  • Vector group Dyn 11, YNd 11, YNyn 0
  • Continuous duty, double copper wound
  • Painting as per IS/IEC standards
  • Both HV & LV side outdoor bushings or cable boxes
  • Cooling radiators/fans
  • Standard fittings as per IS/IEC standards
  • Buchholz relay with alarm and trip contact with shut off valves
  • Oil temperature indicator with alarm and trip contact
  • Winding temperature indicator with alarm and trip contact
  • Magnetic oil level gauge with alarm contact
  • Marshalling box to house oil temperature indicator and winding temperature indicator
  • Cooler control unit
  • Neutral current transformer

Features

• Design conforms to relevant standards
• Low power loss and low noise
• Designed to withstand electrical impulses and thermal and dynamic stresses
• Optimum utilization of active materials for compactness
• Modern manufacturing techniques ensure cost effectiveness and reliability